Transform decimal quantum getter into a free function.

kdeldycke · kdeldycke · commit dba70a5f6052 · 2017-06-26T15:37:44.000+02:00
diff --git a/babel/numbers.py b/babel/numbers.py
@@ -28,6 +28,11 @@
 from babel._compat import decimal, string_types
 from babel.localedata import locale_identifiers
 
+try:
+    long
+except NameError:
+    long = int
+
 
 LC_NUMERIC = default_locale('LC_NUMERIC')
 
@@ -332,6 +337,12 @@ def get_decimal_precision(number):
     return abs(decimal_tuple.exponent)
 
 
+def get_decimal_quantum(precision):
+    """Return minimal quantum of a number, as defined by precision."""
+    assert isinstance(precision, (int, long, decimal.Decimal))
+    return decimal.Decimal(10) ** (-precision)
+
+
 def format_decimal(
         number, format=None, locale=LC_NUMERIC,
         decimal_quantization=True):
@@ -757,15 +768,15 @@ def apply(
 
             # Normalize value to only have one lead digit.
             exp = value.adjusted()
-            value = value * self.quantum(exp)
+            value = value * get_decimal_quantum(exp)
             assert value.adjusted() == 0
 
             # Shift exponent and value by the minimum number of leading digits
             # imposed by the rendering pattern. And always make that number
             # greater or equal to 1.
             lead_shift = max([1, min(self.int_prec)]) - 1
             exp = exp - lead_shift
-            value = value * self.quantum(-lead_shift)
+            value = value * get_decimal_quantum(-lead_shift)
 
             # Get exponent sign symbol.
             exp_sign = ''
@@ -879,7 +890,7 @@ def _format_int(self, value, min, max, locale):
         return value + ret
 
     def _quantize_value(self, value, locale, frac_prec):
-        quantum = self.quantum(frac_prec[1])
+        quantum = get_decimal_quantum(frac_prec[1])
         rounded = value.quantize(quantum)
         a, sep, b = str(rounded).partition(".")
         number = (self._format_int(a, self.int_prec[0],
